Configuring FRITZ!Box to always assign the same IP address to a network device

The FRITZ!Box's DHCP (Dynamic Host Configuration Protocol) server automatically assigns each computer, smartphone, and other network device all of the IP settings required to communicate with the internet and other devices in the home network.

By default, the FRITZ!Box always assigns the same IP address to each device. For this, the FRITZ!Box permanently stores the device's MAC address with the first IP address assigned to it.

The FRITZ!Box only assigns a new IP address to a device if the maximum number of IP addresses in the IP network being used has been reached. However, you can also configure the FRITZ!Box so that it always assigns the same IP address to a device, for example if you would like to configure port sharing for the network device.